Improved sweet-potato flour



' UNITED STATES PATENT QFFICE.

O. K. MARSHALL, OF NEW ORLEANS, LOUISIANA.

IMPROVED SWEET-POTATO FLOUR.

Specification forming part of Letters Patent 91,554, dated June 22, 1869; antedated June 8, 1869.

To all whom it may concern:

Be it known that I, O. K. MARSHALL, of New Orleans, parish of Orleans and State of Louisiana, have invented a new article of commerce and manufacture, which I call Yamoka Flour and I do hereby declare that the following is a full, clear, and exact description of the same.

The nature of my invention consists in the discovery of a new article of commerce and manufacture, to be made out of desiccated sweet-potatoes or yams, which are so plentifully and easily produced in the Southern States, particularly in those States having a sandy or light soil.

By the process hereinafter described I produce a nice article of flour, which can easily be rendered so cheap as to be within the reach of almost any one, while at the same time the healthy vegetable is subjected to no process which in the least degree deprives it of any I first take the sweet-potato or yam, scrape it or skin it, out it into pieces of the proper size to thoroughly dry it, and then dry it by any well-known steaming process. After it has become thoroughly dried I grind it in any kind of grist-mill to the consistency of the finest or coarsest quality of flour now in the market. Any degree of heat that will dry the potatoes rapidly is sufiicientfor the process.

Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent of the United States, is-

As a new article of commerce and manufacture, the reducing of desiccated sweet-potatoes or yams to a fine flour or powder, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

(J. K. MARSHALL.

Witnesses:

EDWIN JAMES, J OHN S. HOLLINGSHEAD. 

